Milton



- (No Model.)

M. O. JONES. Furnace for Steam Boilers.

No. 229,827. Patented .Iulyl3, 1880.

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UNITED STATES PATENT OFFICE.

MILTON C. JONES, OF TROY, NEW YORK.

FURNACE FOR STEAM-BOILERS.

SPECIFICATION formingpart of Letters Patent No. 229,827, dated July 13, 1880. Application filed April 30, 1880. (No model.)

To all whom it may concern:

Be it known that I, MILTON 6. Jonas, of Troy, in the county of Rensselaer and State of New York, have invented certain new and useful Improvements in Gas-Gonsumin g Furnaces for Steam-Boilers, &c., of which. the following is a specification.

My invention relates to the construction and arrangement of the appliances for introducing and heating the air' admitted into the chamber behind the bridge-wall to mingle with the escaping unconsumed inflammable gases and effect their ignition and perfect combustion; and it consists of an air chamber or box placed directly over the charging-door of the furnace, where it serves as a top jamb-plate for said door, and as a saddle on which the front end of the boiler rests. Said air-chamber is provided wit-h openings at or near its ends for the admission of air, and w-itha longitudinal partition, having an opening at the middle thereof, through which the air flows, and is thereby directed against the parts of the air-box where the heat ofthe furnace impinges against it with the greatest intensity. By this arrangement the air-currents protect the box from the destructive effect of the heat, and at the same time the passing air acquires an intensely-high V The said air-chamber is connected, by means of pipes that are exposed to the action of the furnace heat, to a hot-air-distributin g box placed behind the bridge-wall of the furnace, from which the heated'air issues in minute streams to mingle with and ignite the unconsumed' combustible gases.

In the accompanying drawings, which form a part of this specification, and to which reference is herein made, Figure lis a perspective View of the furnace end of a boiler-setting, the boiler and a portion of the brick-work being removed to exhibit my improvements; and Fig. 2 is a perspective view of the front airchamber, with portions of it broken away to expose the underlying parts.

As illustrated in the drawings, A is the furnace, andB the bridge-wall thereof, which may be made with a flat top, as shown in the drawings, or with a curvilinear top, so as to leave a uniform space between the bridge-wall and the bottom of the boiler.

Over the charging-door a of the furnace the air chamber or box 0 is placed. Said box I preferably make of wrought-iron plates, and it should be sufficiently long to secure a good bearing at each end of it on the side walls of the furnace, and wide enough to extend back from the front plate of the boiler-setting to the front end of the boiler, which overlaps the rear edge of the box a few inches. The top of said box should be hollowed out to conform to the circle of the boiler, for which the box serves as a bearing-sad dle. A longitudinal partition, 0, divides the box G into two compartments, and is provided with an opening, 0, at the middle of its lower edge. At or near each end of said box an opening, 0 is made for admitting atmospheric air into the frontcompartment, a Into each end of the rear compartment, 0, is inserted one of the pipes D, which extend back from the air-chamber O, and passing from thence over the furnace A, they connect with the air-distributing box E, which is placed behind the bridge-wall B, and is provided with the perforated top 6.

The operation of my invention is as follows: The air enters thefront compartment, 0 of the air-chamber 0 through the inlet-openings c and is drawn (bythe draft of the smoke-stack) into the rear compartment, 0 through the opening 0, and is thus brought into contact with the lower inner edge of the box 0, where said box is subjected to the greatest heat. By directing the current of air against this part the iron is protected from the destructive effect of the intense heat, and the air becomes more highly heated than it would by being generally distributed through the air-chamber. The heated air then escapes from the rear compartment, 0 into the pipes D, and in passing through said pipes it becomes still more intensely heated. From the pipes D the air passes into the distributing-box E, and from thence it issues, in minute and highly-heated currents, from the perforations in the top 6. The temperature of the air as it issues from the box E is so high that it will mingle with the heated gases that are escaping unconsumed from the furnace and produce a perfect ignition of such gases without lowering the temperature of them in the least degree.

When more convenient or desirable the air-inlet openings 0 may be made in the frontof the box 0 instead of the places shown in the drawings.

5 I claim as my invention- 1. In a furnace, the air chamber or box 0, adapted to serve as the top jamb-plate of the charging-door a of the furnace A, and as a saddle for the front end of a boiler, said chamber 10 being provided with a longitudinal partition,

0, as herein shown and specified.

2. The combination, in a furnace, of an airheating chamber or box, 0, placed directly over the charging-door a, and provided with inlet air-openings 0 with the pipes D and hot- 15 airdistributing box E, provided with the perforated top e, arranged to operate essentially as herein specified.

MILTON G. JONES.

Witnesses WILLIAM H. Low, 0. J. MATTESON. 

